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Liquid ejection head, liquid ejection apparatus, and method of manufacturing liquid ejection head

Active Publication Date: 2016-01-12
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides a liquid ejection head that includes a recording element substrate, an electric wiring substrate, and a housing. The electric wiring substrate has a bent portion and a connecting portion connected to the recording element substrate. The housing has a depression with a member extending into the depression. Part of the other side of the electric wiring substrate is placed between the bottom surface of the depression and the member. The technical effect of this invention is to improve the accuracy and stability of liquid ejection.

Problems solved by technology

Although a principal portion of the electric wiring substrate, specifically, a bent portion is formed of an easy-to-bend material such as that for a flexible wiring substrate, it is difficult to bend completely along the shape of the housing.
However, since the electric wiring substrate 3 is fixed in the state of being applied with a tensile force, a crimped portion of the electric wiring substrate 3 may be cracked, or other portions may wrinkle after the tensile force is released.

Method used

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  • Liquid ejection head, liquid ejection apparatus, and method of manufacturing liquid ejection head
  • Liquid ejection head, liquid ejection apparatus, and method of manufacturing liquid ejection head
  • Liquid ejection head, liquid ejection apparatus, and method of manufacturing liquid ejection head

Examples

Experimental program
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Effect test

first embodiment

[0053]FIGS. 5A and 5B are a side view and a front view of the liquid ejection head according to a first embodiment of this disclosure.

[0054]As illustrated in FIGS. 5A and 5B, the liquid ejection head 8 of this embodiment is provided with a bent portion 38 where the second portion 23 is bent between the first bent portion 33 and the third portion 24. A second bent portion 39 formed by using the bent portion 38 is bent in a direction opposite to a direction in which the first bent portion 33 is bent.

[0055]In this embodiment, the bent portion 38 includes a depression 40 formed on the second surface 10b and an inner member 41 arranged in the interior of the depression at a distance from an inner side surface of the depression 40. The second bent portion 39 is formed by passing the second portion 23 through a gap between the inner side surface of the depression 40 and the inner member 41.

[0056]The inner member 41 is preferably on the second direction Y side with respect to the first bent...

second embodiment

[0073]FIGS. 8A and 8B are a side view and a front view of the liquid ejection head according to a second embodiment of this disclosure. Same components as in the first embodiment are denoted by the same reference numerals and description thereof is omitted.

[0074]As illustrated in FIGS. 8A and 8B, in the liquid ejection head 8 of this embodiment, the depression 40 has a semicircular shape in a cross section intersecting the direction of center axis of curvature Z. The inner member 41 has a semicircular shape in a cross section intersecting the direction of center axis of curvature Z, and an arcuate portion faces the inner side surface of the depression 40.

[0075]Here, a process of passing the electric wiring substrate 11 through the gap between the inner side surface of the depression 40 and the inner member 41 will be described with reference to FIGS. 9A to 9C.

[0076]FIG. 9A is a drawing for explaining the process of passing the electric wiring substrate 11 through the gap between the...

third embodiment

[0087]FIGS. 10A and 10B are a side view and a front view of the liquid ejection head according to a third embodiment of this disclosure. Same components as in the first embodiment are denoted by the same reference numerals and description thereof is omitted.

[0088]As illustrated in FIGS. 10A and 10B, the first corner portion 49 of the depression 40 is round and the second corner portion 50 of the depression 40 is angular. The first end portion 51 of the inner member 41 is round and the second end portion 52 of the inner member 41 is angular.

[0089]Here, a process of passing the electric wiring substrate 11 through the gap between the inner side surface of the depression 40 and the inner member 41 will be described with reference to FIGS. 9A to 9C.

[0090]FIG. 9C is a drawing for explaining the process of passing the electric wiring substrate 11 through the gap between the inner side surface of the depression 40 and the inner member 41 in the liquid ejection head 8 (see FIGS. 10A and 10B...

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Abstract

A liquid ejection head including:a recording element substrate provided with an element;an electric wiring substrate having a bent portion, a connecting portion provided on one side of the bent portion and connected with the recording element substrate, and an input portion provided on the other side of the bent portion; anda housing having a first surface, a second surface, a depression provided on the second surface, and a member separated from a bottom surface of the depression and extending into an opening of the depression, whereinpart of the other side of the electric wiring substrate is disposed between the bottom surface of the depression and the member.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]This disclosure relates to a liquid ejection head configured to eject a liquid, and a liquid ejection apparatus provided with the liquid ejection head. This disclosure also relates to a method of manufacturing the liquid ejection head.[0003]2. Description of the Related Art[0004]A liquid ejection head forms an image by ejecting liquid drops. Ejection of the liquid drops is achieved by heating liquid with an energy generating element provided with a heat generating resistance member and causing the liquid to undergo film boiling. Alternatively, there is a case where a piezoelectric element is used for ejection of the liquid drops, and there is also a case where a method of irradiating the liquid with an electromagnetic wave generated by a laser or the like is used. The liquid ejection head is mounted generally on a recording apparatus body. The liquid ejection head is controlled and driven by an electric signal supplied ...

Claims

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Application Information

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IPC IPC(8): B41J2/175B41J2/14B41J2/16
CPCB41J2/14201B41J2/1607B41J2/14024B41J2/14072B41J2/1603B41J2/1623Y10T29/49117
Inventor TOMIZAWA, KEIJIKODOI, TAKUMAIWANO, TAKUYA
Owner CANON KK